You may usually use client tools to connect and query mongodb during the development process, but generally the databases in production do not allow local client connections. This article mainly explains how to connect to the mongodb server through the command line and use some simple query statements Article directory 1. Connect to mongodb from […]
Tag: connect
[[FIFO to BRAM IP interconnection, that is, AXIstream is transferred to the verilog code on BRAM]]
FIFO to BRAM IP interconnection, that is, AXIstream is transferred to the verilog code on BRAM control.v module control #( parameter TDATA_WIDTH = 32 , parameter BRAM_A_ADDR_WIDTH = 15 , parameter BRAM_din_WIDTH = 32 , parameter BRAM_B_ADDR_WIDTH = 15 )( input [TDATA_WIDTH – 1 : 0] tdata , input tvaild, input sys_clk, input sys_rst_n , […]
SVN server construction in Linux environment and integration with intranet penetration to achieve remote connection
Article directory Preface 1. Install SVN service on Ubuntu 2. Modify configuration file 2.1 Modify the svnserve.conf file 2.2 Modify passwd file 2.3 Modify authz file 3. Start the svn service 4. Intranet penetration 4.1 Install cpolar intranet penetration 4.2 Create tunnel mapping local port 5. Test public network access 6. Configure a fixed public […]
Springboot interface current limit to prevent connection point attacks
Article directory summary Overall architecture process Explanation of technical terms technical details summary Summary Use aop aspect + redis to implement interface current limit, IP limit, and prevent repeated submission Overall architecture process Tips: Use aop aspect + redis to implement interface current limit, IP limit, and prevent repeated submission Interface file package com.bzfar.config; import […]
Vulnerability anti-connection detection combination: intranet penetration and multi-protocol reuse port
http://Yaklang.io anti-connection technology three axe Anti-connection service Multi-protocol port multiplexing Intranet penetration What is anti-connection? Why do it Many times, when we perform vulnerability detection, we cannot determine whether a vulnerability exists through the information returned by the application. But if the command/special operation is indeed executed, how do we prove that the command or […]
MySQL Lecture 5·About foreign keys and connections, how to achieve related queries?
Hello, I am safe and sound. Article directory Foreign keys and joins: how to do related queries? How to create foreign key? connect Misunderstandings in related queries Foreign keys and connections: How to do related queries? In the actual database application development process, we often need to associate two or more tables to obtain the […]
Android connection bluetooth example
Android connection Bluetooth process (complete code at the end) Declare permissions 1) Declare permissions in the AndroidManifest manifest file (Note: Searching for Bluetooth requires location permission!!) <uses-permission android:name=”android.permission.BLUETOOTH” /> <uses-permission android:name=”android.permission.BLUETOOTH_ADMIN” /> <uses-permission android:name=”android.permission.BLUETOOTH_CONNECT” /> <uses-permission android:name=”android.permission.BLUETOOTH_SCAN” /> <uses-permission android:name=”android.permission.ACCESS_FINE_LOCATION” /> <uses-permission android:name=”android.permission.ACCESS_COARSE_LOCATION” /> 2) Apply for runtime permissions if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_SCAN) != PackageManager.PERMISSION_GRANTED ) […]
10. W5100S/W5500+RP2040 Raspberry Pi Pico<PING (ICMP) to detect network connectivity>
Article directory 1 Introduction 2 Introduction to the protocol 2.1 What is PING 2.2 Advantages of PING 2.3 Principle of PING 2.4 Application scenarios 3 WIZnet Ethernet chip 4 PING network setting example overview and usage 4.1 Flowchart 4.2 Core preparation work 4.3 Connection method 4.4 Main code overview 4.5 Burning Verification 5 things to […]
Print database query results to the web page, the database connection is based on Druid
First write an EmpDao interface, which has a method to query all data package com.sun.test; import java.util.List; public interface EmpDao { public List<Emp> findAll(String name,String sex); } Write an implementation class to implement this interface and inherit our BaseDao, which is full of encapsulated add, delete, modify and query statements in the database. package com.sun.test; […]
Springboot connects to Siemens plc, reads the corresponding value, and modifies it to the database
springboot connects to Siemens plc, reads the corresponding value, and modifies it to the database Requirements: The server connects to the plc, reads the data, and then writes it to the database, but the speed is required, and the values corresponding to the commands in the plc are constantly changing. The server must see this […]